Eun-Jin Jang, Tai-Yong Kim, Jeong-A. Lim, Min-Ah Woo
{"title":"Primer generation-rolling circle amplification method optimized for the detection of pathogenic bacteria","authors":"Eun-Jin Jang, Tai-Yong Kim, Jeong-A. Lim, Min-Ah Woo","doi":"10.1007/s12257-024-00117-2","DOIUrl":null,"url":null,"abstract":"<p>With advancements in DNA amplification research, isothermal amplification technology has emerged as an attractive method for detecting target DNA. Here, we describe primer generation-rolling circle amplification (PG-RCA) as an isothermal amplification method for detecting <i>Escherichia coli</i> O157:H7, <i>Salmonella</i> Typhimurium, <i>Bacillus cereus</i>, and <i>Listeria monocytogenes</i>. To improve PG-RCA sensitivity, the concentrations of the reaction components, dNTPs, phi29 DNA polymerase, and circular probes were optimized; the optimized conditions were applied to detect each target bacterium. A pair of forward and reverse circular probes that hybridized to the sense and anti-sense target genes was used in PG-RCA, exhibiting target selectivity. PG-RCA, which generated additional primers simultaneously with linear RCA and comprised multiple reaction cycles, resulted in higher accumulation of amplified DNA products than did linear RCA within the same reaction period. The threshold time (Tt) for each target gene concentration was determined based on the threshold value set in the amplification plot for PG-RCA, and a linear correlation between the Tt value and genomic DNA concentration was proven for each of the four bacteria. The PG-RCA-based assay could be applied to gene-based detection of various microorganisms and may be a useful isothermal amplification method for replacing traditional PCR methods.</p>","PeriodicalId":8936,"journal":{"name":"Biotechnology and Bioprocess Engineering","volume":"91 1","pages":""},"PeriodicalIF":2.5000,"publicationDate":"2024-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Biotechnology and Bioprocess Engineering","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1007/s12257-024-00117-2","RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"BIOTECHNOLOGY & APPLIED MICROBIOLOGY","Score":null,"Total":0}
引用次数: 0
Abstract
With advancements in DNA amplification research, isothermal amplification technology has emerged as an attractive method for detecting target DNA. Here, we describe primer generation-rolling circle amplification (PG-RCA) as an isothermal amplification method for detecting Escherichia coli O157:H7, Salmonella Typhimurium, Bacillus cereus, and Listeria monocytogenes. To improve PG-RCA sensitivity, the concentrations of the reaction components, dNTPs, phi29 DNA polymerase, and circular probes were optimized; the optimized conditions were applied to detect each target bacterium. A pair of forward and reverse circular probes that hybridized to the sense and anti-sense target genes was used in PG-RCA, exhibiting target selectivity. PG-RCA, which generated additional primers simultaneously with linear RCA and comprised multiple reaction cycles, resulted in higher accumulation of amplified DNA products than did linear RCA within the same reaction period. The threshold time (Tt) for each target gene concentration was determined based on the threshold value set in the amplification plot for PG-RCA, and a linear correlation between the Tt value and genomic DNA concentration was proven for each of the four bacteria. The PG-RCA-based assay could be applied to gene-based detection of various microorganisms and may be a useful isothermal amplification method for replacing traditional PCR methods.
期刊介绍:
Biotechnology and Bioprocess Engineering is an international bimonthly journal published by the Korean Society for Biotechnology and Bioengineering. BBE is devoted to the advancement in science and technology in the wide area of biotechnology, bioengineering, and (bio)medical engineering. This includes but is not limited to applied molecular and cell biology, engineered biocatalysis and biotransformation, metabolic engineering and systems biology, bioseparation and bioprocess engineering, cell culture technology, environmental and food biotechnology, pharmaceutics and biopharmaceutics, biomaterials engineering, nanobiotechnology, and biosensor and bioelectronics.